Stay-bolt structure



Jorrit Bocinas ricanuiiitv aan Erima i nenne, ri'rrssuaea, PENNSYLVANIA,

- assieiior-.s To iiLaiuNnR-rV Bciircenraia, er rrr'rssirasiri, riermsrnvauia, a

CORPORATION 0F DELAWABJE.

` STAY-BOLT Application filed July 2,

To all whom t may cow/ocra.' Y v ,Y H I Be it known that we, JOHN4 ROGERS FLANNERY and ETHAN I. VDoDDs, citizens of the United States, and residents of Pittsburgh, in the countyl of v Allegheny and Stater of Pennsylvania, have inventedcertain new and useful Improvements in Stay-Bolt Structures; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to improvements in staybolt structures, one object of the invention being to provide means whereby the bolt is connected with the outer boiler sheet in such manner that the mounting for the rounded head of the bolt shall be capable of universal movement to insure the properv and accurate alignment of the bolt between the two boiler sheets whether said sheets hc parallel with or at an angle to each other,

or the bolt opening in the inner sheet is not in eXactvalignment with the bolt opening of the outer boiler sheet, and to secure the inner end of the bolt to the inner boiler sheet in such manner as to effect a water..

and steam-tight connection and at the same time avoid upsetting of the inner end of the bolt and the danger of crystallization of the metal of the bolt, due to an upsetting operation.

With this and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claim. Y

In the accompanying drawings; VFigure l is a sectional view showing an embodiment of our invention, and Figures 2 and 3 are views of modifications. Y

l represents an outer boiler sheet and 2 an inner boiler sheet, the latter having a threaded opening 3 for the accommodation of the threaded inner end i of a staybolt 5. The staybolt is provided at kits outer end with a rounded head 6 which may be partly spherical in form, and said bolt may be also provided with a tell-tale hole 7 extending from the inner end of said bolt to the headed end and terminating within the head 6, or the bolt may be made solid as shown in Figure 2,

The Outer bolrsheet is provided with y universal srRU'crira-E.

raie. sei-iai No. scaici..

an opening which is larger at its outer than at its inner end, and the wall of said openinginay bemade curved or concave transversely of the sheet to form a seat 8 for a bearing sleeve or bushing 9,7as shownrin Figure/flg,l Y

The sleeve or bushing 9 is made with a Lconvex outer portion 10 where it engages lthe seat 8 in the boiler sheet, so that said sleeve or bushingshall be capable of uni` versal movement when the bolt is being in* stalled. The sleeve or bushing is provided internally with a curved or concave seat lOa for the rounded head of the staybolt. The portion 11 of the sleeve or bushing may be straight and threaded for the reception of a cap or closure 12.

s When the staybolt shall havebeen placed in position with the head mounted in the sleeve or bushingv and the threaded inner end passing through the threaded opening in the inner boiler sheet, (the sleeve or bushing moving automatically, if necessary, to effect proper alignment of the bolt relatively to its connections with the respective boiler sheets) the metal ofrsaid sleeve or bushing may be permanently united to and made integral with the metal of the outer j and in this manner the injurious effects of y crystallization of the metal of the'bolt which might occur were the end of the bolt subjected to an upsetting operation, will be obviated. Furthermore, the welding of the inner end of the staybolt to the inner boiler sheet rather than upsetting said inner end of the bolt, is valuable when the headed outer yend of the bolt is mounted in a bear"V ing member which is capable of an initial adjustment. After the parts have been properly adjusted, upsetting of the inner end of the bolt may interfere with y such adjustment, but'by securing the inner end of the bolt to the inner boiler sheet. by welding, there is no danger of throwing the bearing member out of adjustment prior Yto the welding of said member to the outer boiler sheet. In the construction shown in. Figure l, the inner end of the bolt projectsl slightly beyond the inner face of the inner boiler-sheet and a builtfup weld l5 sur winding this projecting portion of the bolt and overlying the inner end thereof, connects the bolt with the inner face of said inner boiler sheet, so that the end of the bolt and the boiler sheet Will become an integral structure.

In Figure 3, the KWeld 15a surrounds the threaded projecting portion of the bolt n Without overlying the inner end of the lat- Jser, While in Figure 2, the inner end of the bolt is flush With the inner face of the inner boiler sheet, and the Weld 15b overlies both the end of the bolt and the inner face of the inner boilersheet.

Having y:tully described our invention what We claim as new and desire to secure n by Letters Patent, is K n In a staybolt structure, the combination With kinner and outer boiler sheets having openings, of a bearing member having initial universally movable mounting at the opening in one boiler Sheet, a staybolt having a head at one end movably mounted in said bearing member, said staybolt having its other end passing through the opening in the other boiler sheet, and means ineluding a Weld for uniting the last-mentioned end of the staybolt- With the boiler sheet through which it passes.

In testimony whereof, We have signed this specification in the pre-sence of two sub soribing Witnesses.

JOI-IN ROGERS FLANNERY. ETHAN I. DODDS. lVitnesses:

JAMES R. HORAN, EDWIN S. RYGE. 

